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  • 1
    Electronic Resource
    Electronic Resource
    Electrical Properties of SiGe Epitaxial Layers for Photovoltaic Application as Studied by Scanning Electron Microscopical Methods (1998)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 63-64 (Dec. 1998), p. 509-518 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/26/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.63-64.509.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Robertsonian house mouse populations in Tunisia: A karyological and biochemical study (1986)
    Springer
    Genetica 68 (1986), S. 151-156 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new population of Mus musculus domesticus showing Robertsonian translocations (2n = 22) has been identified in Tunisia. Mice carried 9 pairs of Robertsonian translocations: Rb(1.11), Rb(2.16), Rb(3.12), Rb(4.6), Rb(5.14), Rb(7.18), Rb(8.9), Rb(10.17) and Rb(13.15). Five of the nine translocations are not known to occur elsewhere. In two populations only 2n = 22 mice were present, whereas in a third one a mixture of karyotypes (2n = 22, 38, 39, 40) was found. The slight electrophoretic differentiation observed for other Robertsonian populations as well as the hybrid nature of the karyotypically heterogeneous populations are confirmed. Allele frequency differences between the 2n = 22 and 2n = 40 mice in the latter population show that local electrophoretic differentiation exists and allow to compare chromosome flow and gene flow. The presence of a chromosome-1 polymorphism for additional fragments of heterochromatin present in the Robertsoman population provides a convenient marker of recombinational events in the hybrid zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02424412
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  • 3
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    Les larves de poissons téléostéens le long des côtes Est tunisiennes : distribution et abondance (2013)
    Details
    Publication Date: 2021-05-19
    Description: Une campagne de prospection planctonique à été réalisée entre le 24 juin et le 7 juillet 2008 au large des côtes Est de la Tunisie depuis le Cap bon jusqu’à Ras Kapoudia. Les objectifs de cette campagne consistaient à étudier l’assemblage larvaire des poissons téléostéens et d’évaluer l’influence des facteurs environnementaux sur leur distribution spatiale. Au total 10832 larves ont été identifiées appartenant à 46 taxons. La distribution spatiale des larves a montré une grande variabilité interspécifique. En effet, plusieurs facteurs sont intervenus dans leur distribution. Nous citons en premier lieu la circulation complexe des masses d’eaux, qui est responsable de la répartition des larves bien éloignées des aires de ponte. Le gradient de la profondeur et l’habitat des géniteurs sont également des facteurs déterminant dans la distribution larvaire, particulièrement en ce qui concerne les poissons néritiques et mésopélagiques.
    Description: An ichthyoplankton survey was carried out on 24th June to 7th July 2008 along the eastern Tunisian coast from Cap Bon to Ras Kapoudia. The study deals with larval teleost fish assemblage and assess the impact of environmental factors on their spatial distribution. A total of 10832 fish larvae were identified belonged to 46 different taxa. Larval spatial distribution showed a high interspecific variability depending on the species if it’s a neritic, mesopelagic or pelagic species. Several factors affected the fish larval distribution. The first one is the complex circulation of water masses, which is responsible for the distribution of larvae on areas distant from their spawning sector. The depth gradient and the habitat of adults are also two factors which play an important role in the distribution of larvae mainly in the case of mesopelagic and neritic fish.
    Description: Published
    Description: larvae, larval assemblage
    Keywords: Fish larvae ; Environmental factors ; Spatial distribution
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 4
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    Analyse moléculaire des relations Phylogénétiques au sein des six espèces de Mugilidae en Tunisie (2015)
    Details
    Publication Date: 2021-05-19
    Description: Afin d’étudier les relations phylogénétiques chez les six espèces méditerranéennes de la famille de Mugilidé en Tunisie (Mugil cephalus, Chelon labrosus, Liza aurata, Liza ramada, Liza saliens et Oedalechilus labeo), un fragment de 589pb du gène mitochondrial ARN 16S a été analysé. Ce gène à été amplifié, séquencé puis analysé chez les différentes espèces. La détermination des différentes espèces de mugilidé réalisée dans cette étude est en accord avec les données de séquences disponibles dans GenBank et confirme la présence de l’espèce Oedalechilus labeo dans les côtes tunisiennes malgré sa rareté. L’arbre phylogénétique établit confirme la grande divergence de Mugil cephalus par rapport aux autres espèces présentes en Méditerranée. Le genre Oedalechilus est validé alors que la validité du genre Chelon est remise en question du fait de sa position au sein du clade regroupant les 3 espèces du genre Liza.
    Description: In the aim to study the relationships among the mediterranean mugilidae species in Tunisia (Mugil cephalus, Chelon labrosus, Liza aurata, Liza ramada, Liza saliens and Oedalechilus labeo), 589 bp of mitochondrial gene sequence (16S rRNA) were analysed. This gene was amplified, sequenced and analysed for all species. The Mugilidae species determination was in agreement with sequences data in GenBank and confirms the presence of Oedalechilus labeo in the Tunisian coasts in spite of its rarity. The phylogenetic tree established in this study, confirm the high divergence of Mugil cephalus. The Oedalechilus genus was valid, whereas the validity of the genus Chelon was questioned in reason of its regrouping with the Liza species.
    Description: Published
    Description: Mugilidae
    Description: ARNr 16S
    Description: Mugil cephalus
    Description: Chelon labrosus
    Description: Liza aurata
    Description: Liza ramada
    Description: Liza saliens
    Description: Oedalechilus labeo
    Description: Phylogénie
    Keywords: Genes
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 5
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    NIR Tully-Fisher in the Zone of Avoidance - III. Deep NIR catalogue of the HIZOA galaxies (2016)
    Oxford University Press
    Details
    Publication Date: 2016-08-31
    Description: We present a deep near-infrared (NIR; J , H , and K s bands) photometric catalogue of sources from the Parkes H i Zone of Avoidance (HIZOA) survey, which forms the basis for an investigation of the matter distribution in the Zone of Avoidance. Observations were conducted between 2006 and 2013 using the Infrared Survey Facility (IRSF), a 1.4-m telescope situated at the South African Astronomical Observatory site in Sutherland. The images cover all 1108 HIZOA detections and yield 915 galaxies. An additional 105 bright 2MASS galaxies in the southern ZOA were imaged with the IRSF, resulting in 129 galaxies. The average K s -band seeing and sky background for the survey are 1.38 arcsec and 20.1 mag, respectively. The detection rate as a function of stellar density and dust extinction is found to depend mainly on the H i mass of the H i detected galaxies, which in principal correlates with the NIR brightness of the spiral galaxies. The measured isophotal magnitudes are of sufficient accuracy (errors ~0.02 mag) to be used in a Tully–Fisher analysis. In the final NIR catalogue, 285 galaxies have both IRSF and 2MASS photometry (180 HIZOA plus 105 bright 2MASX galaxies). The K s -band isophotal magnitudes presented in this paper agree, within the uncertainties, with those reported in the 2MASX catalogue. Another 30 galaxies, from the HIZOA northern extension, are also covered by UKIDSS Galactic Plane Survey (GPS) images, which are one magnitude deeper than our IRSF images. A modified version of our photometry pipeline was used to derive the photometric parameters of these UKIDSS galaxies. Good agreement was found between the respective K s -band isophotal magnitudes. These comparisons confirm the robustness of the isophotal parameters and demonstrate that the IRSF images do not suffer from foreground contamination, after star removal, nor underestimate the isophotal fluxes of ZoA galaxies.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
    Published by Oxford University Press
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  • 6
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    Crystal Structure of the Redox-Active Cofactor Dibromothymoquinone Bound to Circadian Clock Protein KaiA and Structural Basis for Dibromothymoquinone’s Ability to Prevent Stimulation of KaiC Phosphorylation by KaiA (2012)
    American Chemical Society (ACS)
    Details
    Publication Date: 2012-10-06
    Description: Biochemistry DOI: 10.1021/bi301222t
    Print ISSN: 0006-2960
    Electronic ISSN: 1520-4995
    Topics: Biology , Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
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  • 7
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    High quality, relaxed SiGe epitaxial layers for solar cell application (1999)
    Elsevier
    Details
    Publication Date: 1999-01-01
    Print ISSN: 0040-6090
    Electronic ISSN: 1879-2731
    Topics: Physics
    Published by Elsevier
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  • 8
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    On how to extend the NIR Tully-Fisher relation to be truly all-sky (2015)
    Oxford University Press
    Details
    Publication Date: 2015-01-04
    Description: Dust extinction and stellar confusion by the Milky Way reduce the efficiency of detecting galaxies at low Galactic latitudes, creating the so-called Zone of Avoidance (ZoA). This stands as a stumbling block in charting the distribution of galaxies and cosmic flow fields, and therewith our understanding of the local dynamics in the Universe (cosmic microwave background dipole, convergence radius of bulk flows). For instance, ZoA galaxies are generally excluded from the whole-sky Tully–Fisher (TF) surveys (| b | ≤ 5°) even if catalogued. We show here that by fine-tuning the near-infrared (NIR) TF relation, there is no reason not to extend peculiar velocity surveys deeper into the ZoA. Accurate axial ratios ( b / a ) are crucial to both the TF sample selection and the resulting TF distances. We simulate the effect of dust extinction on the geometrical properties of galaxies. As expected, galaxies appear rounder with increasing obscuration level, even affecting existing TF samples. We derive correction models and demonstrate that we can reliably reproduce the intrinsic axial ratio from the observed value up to extinction level of about A J ~= 3 mag ( A V  ~ 11 mag); we also recover a fair fraction of galaxies that otherwise would fall out of an uncorrected inclination limited galaxy sample. We present a re-calibration of the 2MTF (The Two Micron All Sky Survey Tully–Fisher Survey) relation in the NIR J , H , and K s bands for isophotal rather than total magnitudes, using their same calibration sample. Both TF relations exhibit similar scatter at high Galactic latitudes. However, the isophotal TF relation results in a significant improvement in the scatter for galaxies in the ZoA, and low surface brightness galaxies in general, because isophotal apertures are more robust in the face of significant stellar confusion.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
    Published by Oxford University Press
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  • 9
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    NIR Tully-Fisher in the Zone of Avoidance - II. 21 cm H I-line spectra of southern ZOA galaxies (2016)
    Oxford University Press
    Details
    Publication Date: 2016-02-12
    Description: High-accuracy H i profiles and linewidths are presented for inclined (( b / a ) o 〈 0.5) spiral galaxies in the southern Zone of Avoidance (ZOA). These galaxies define a sample for use in the determinations of peculiar velocities using the near-infrared Tully–Fisher (TF) relation. The sample is based on the 394 H i -selected galaxies from the Parkes H i Zone of Avoidance survey (HIZOA). Follow-up narrow-band Parkes H i observations were obtained in 2010 and 2015 for 290 galaxies, while for the further 104 galaxies, sufficiently high signal-to-noise (S/N) spectra were available from the original HIZOA data. All 394 spectra are reduced and parametrized in the same systematic way. Five different types of linewidth measurements were derived, and a Bayesian mixture model was used to derive conversion equations between these five widths. Of the selected and measure galaxies, 342 have adequate signal to noise (S/N ≥ 5) for use in TF distance estimation. The average value of the S/N ratio of the sample is 14.7. We present the H i parameters for these galaxies. The sample will allow a more accurate determination of the flow field in the southern ZOA which bisects dynamically important large-scale structures such as Puppis, the Great Attractor, and the Local Void.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
    Published by Oxford University Press
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  • 10
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    Robertsonian house mouse populations in Tunisia: A karyological and biochemical study (1986)
    Springer
    Details
    Publication Date: 1986-01-01
    Print ISSN: 0016-6707
    Electronic ISSN: 1573-6857
    Topics: Biology
    Published by Springer
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